Spezifisch ???*-induzierte Reaktionen von ?-Dimethoxymethylcyclohexen-2-onen: 1,3-Umlagerung und Wasserstoffabstraktion durch das ?-Kohlenstoffatom
作者:Jean Gloor、Kurt Schaffner
DOI:10.1002/hlca.19740570631
日期:——
When α,β-unsaturated γ-dimethoxymethyl cyclohexenones are excited to the S2(π,π*) state, certain unimolecular reactions can be observed to compete with S2 S1 internal conversion. These reactions do not occur from the S1(n,π*) or the lowest T(π,π* and n,π*) states. They comprise the radical elimination of the formylacetal substituent (cf. 8, 9 32 + 33), γ α formylacetal migration (cf. 6 27, 8 30, 9
当α,β-不饱和的γ-二甲氧基甲基环己烯酮被激发到S 2(π,π*)状态时,可以观察到某些单分子反应与S 2 S 1的内部转化竞争。从S 1(n,π*)或最低的T(π,π*和n,π*)状态不会发生这些反应。它们包括formylacetal取代基的自由基清除(CF。8,9 32 + 33),γαformylacetal迁移(CF。6 27,8 30,9 34,12 37),以及涉及甲氧氢的在β位置(转移到α碳和环闭合的环化过程比照。6 28,8 31,12 38,20 40 + 41)。